CoZn铁氧体/盐酸掺杂聚苯胺(HCl-PANI)复合颗粒的合成及表征

Improving Conductivity of HCl Doped Polyaniline(HCl-PANI) Composite Particles with CoZn Ferrite

通过将盐酸掺杂聚苯胺(HCl-PANI)导电聚合物和CoZn铁氧体颗粒复合制备CoZn铁氧体/HCl-PANI复合颗粒并测量其电导率。两探针法测试结果表明电导率由0.029 5 S/cm(HCl-PANI)提高到0.364 S/cm(CoZn铁氧体/HCl-PANI复合颗粒),此时该CoZn铁氧体的灼烧温度为800℃,在复合颗粒中的质量含量为30%。由红外光谱(FTIR)可知,在HCl-PANI与CoZn铁氧体之间存在某种化学键。紫外光谱(UV-Vis)分析表明在较低的灼烧温度下残余的Zn2+影响了HCl-PANI分子链中苯环的π-π*跃迁。微观扫描电镜(SEM)观察显示,HCl-PANI包覆在CoZn铁氧体的表面形成核-壳结构。热失重(TGA)分析表明灼烧温度为900℃时制备的CoZn铁氧体可以提高该复合颗粒的热稳定性。

We propose our different way of improving HCl-PANI composite particles through preparation of CoZn ferrite/HCl-PANI composite particles under suitable conditions. The conductivity of the composite particles was studied through two-probe method at room temperature. Table 1 in the full paper summarizes the experimental results on the conductivity of CoZn ferrite/HCl-PANI composite particles for five different values of mass content of CoZn ferrite--0%, 10%, 20%, 30% and 40% and two different temperatures of cauterizing CoZn ferrite 800℃ and 900℃. The conductivity of CoZn ferrite/ HCl-PANI composite particles for 30% mass content and 800℃ cauterization temperature is 0. 364 S/cm, more than ten times higher than 0. 0295 S/cm for HCl-PANI composite particles. Fourier transform infrared （FTIR） spectra, shown in Fig. 2 in the full paper, suggest that there are some chemical bonds between CoZn ferrite and HCl-PANI. Ultraviolet-Visible （UV-vis） spectroscopy results, shown in Fig. 3 in the full paper, show that, during the cauterization of CoZn ferrite at 800℃, the residual Zn^2＋ ions affect the π-π^＊ transition of the benzene ring in the molecular chain of HCl-PANI. Thermogravimetric analysis （TGA） results, shown in Fig. 4 in the full paper, elucidate that the CoZn ferrite cauterized at 900℃ increases the thermal stability of the CoZn ferrite/ HCl-PANI composite particles. Scanning electron microscopy （SEM） photos, shown in Fig. 5 in the full paper, indicate that the CoZn ferrite particles are embedded wholly in HCl-PANI.